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Biosurfactant producing microorganisms and its application to enhanced oil reco...

Microbial Enhanced Oil Recovery (MEOR) is a tertiary oil recovery process where microorganisms and their metabolites are used to retrieve unrecoverable oil from mature reservoirs. Stimulation of biosurfactant production by indigenous microorganisms can reduce the capillary forces that retain the oil into the reservoir. The studied reservoir is characterized by alternated oil and water sand layers, with an avera...

Effect of solids on gas-liquid mass transfer

Effect of Solids on Gas-Liquid Mass Transfer in Three-Phase Bubble Columns

A simple ESR identification methodology for Electrolytic Capacitors conditon mo...

Electrolytic capacitors are usually used in power electronic systems for smoothing, energy storage or filtering. They have the best overall performance for these objectives being a critical element in the design of these systems, in several applications, with different requirements. But, infortunately, in most cases, they are the most life-limiting device. The expected life of electrolytic capacitors depends on...

Ocorrência de Bipolaris maydis causando mancha foliar em Paspalum atratum cv. P...

Bipolaris maydis was consistently isolated from infected Paspalum atratum cv. Pojuca plants showing leaf spot symptoms in the Cerrado of Brazil, in 2002. Pathogenicity tests under greenhouse conditions and subsequent reisolations of B. maydis from artificially inoculated Pojuca seedlings confirmed the hypothesis that this fungus was the causal agent of the disease. Symptoms of leaf spot appeared four days after...

Effect of solids on mass transfer in multiphase systems

Predição da composição química do sorgo pela técnica de espectroscopia de refle...

Determinou-se a composição química do sorgo pela espectroscopia de reflectância no infravermelho próximo (NIRS), comparando-a com os dados obtidos pelas análises convencionais de laboratório. Foram utilizadas 132 amostras de quatro variedades de sorgo: AG212 (porte alto), AG 2002 (porte alto), AG 2005 (duplo propósito) e AG 213 (porte alto). Com o intuito de se obter uma curva ampla, todas as amostras foram agr...

Urucui - cultivar de arroz de sequeiro de ciclo precoce para o Piaui.

A orizicultura tem uma grande importancia social e economica para o Piaui. Segundo a FIBGE (1991), na safra de 1988/89 foram produzidos 347.919 toneladas de arroz numa area de 261.903 ha, o que colocou o Estadono nono lugar em producao entre todas as unidades da Federacao. O manejo da cultura, os frequentes periodos de defic hidrico que ocorrem durante as fases de desenvolvimento do arroz e o uso de cultivares ...